已知正实数
的平方根是
和
.
(1)当
时,求
的值;
(2)在(1)条件下,若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a26bbed3828854ea52838f569b184fd.png)
(1)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/019eb94a6a2b38308811470d860e1a20.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)在(1)条件下,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8eb7e0700874db8431acd8f5550576c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
更新时间:2024-05-20 20:16:45
|
相似题推荐
解答题-计算题
|
较易
(0.85)
【推荐2】在解不等式
时,小马同学给出了如下解法:
解:去括号,得
,
移项,得
,
合并同类项,得
,
两边都除以
,得
.
判断小马同学的解法是否有错误?若有错误,请写出正确的解答过程.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/956551b0d2ea3551d0d5247a5eae7f42.png)
解:去括号,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dce859f15b54c75c349ce16247062640.png)
移项,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1d014176bbd3a8dcf271f5cb65b3af9.png)
合并同类项,得
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/119cfa72adcd7e44b1adde9a05982ce2.png)
两边都除以
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274a9dc37509f01c2606fb3086a46f4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2e109d31afb394e01c438eaacb8fa3e0.png)
判断小马同学的解法是否有错误?若有错误,请写出正确的解答过程.
您最近一年使用:0次